<html>
<body>
<form action="/1322" method="post" enctype="application/x-www-form-urlencoded">
    <input type="text" name="foo[bar]" value="123" />
    <button>Submit</button>
</form>

<form action="/1322" method="post" enctype="application/x-www-form-urlencoded">
    <input type="text" name="foo.bar" value="123" />
    <button>Submit</button>
</form>

</body>
</html>